+ * Revision 1.4 1998/02/20 17:52:32 mdw
+ * Don't use `df' for noise gathering, because it gets upset when NFS
+ * servers aren't responding.
+ *
+ * Revision 1.3 1998/01/12 16:46:19 mdw
+ * Fix copyright date.
+ *
+ * Revision 1.2 1997/08/20 16:19:57 mdw
+ * Fix test for `/dev/random' so that it doesn't close `stdin' if it fails!
+ *